package com.demo.intercept;

import com.demo.common.utils.UserHolder;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 用来刷新token，使得浏览器上的token有效，在每次请问的时候进行token过期时间重置
 * 通过ThreadLocal来实现
 */
public class RefreshTokenInterceptor implements HandlerInterceptor {

//    private StringRedisTemplate stringRedisTemplate;

//    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
//        this.stringRedisTemplate = stringRedisTemplate;
//    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1.获取请求头中的token
        String token = request.getHeader("authorization");
//        if (StrUtil.isBlank(token)) {
//            return true;
//        }
        // 2.基于TOKEN获取redis中的用户
//        String key  = LOGIN_USER_KEY + token;
//        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);
        // 3.判断用户是否存在
//        if (userMap.isEmpty()) {
//            return true;
//        }
        // 5.将查询到的hash数据转为UserDTO
//        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        // 6.存在，保存用户信息到 ThreadLocal
//        UserHolder.saveUser(userDTO);
        // 7.刷新token有效期
//        stringRedisTemplate.expire(key, LOGIN_USER_TTL, TimeUnit.MINUTES);
        // 8.放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 移除用户
        UserHolder.removeUser();
    }
}
